The activity phase of BF Cygni discovered in May 1989 and which lasted about two years is examined. The UV emission lines, usually strong during quiescence...
The Central Star of NGC 2346 as a Clue to Binary Evolution through the Common Envelope Phase
We present an analysis of the binary central star of the planetary nebula NGC 2346 based on archival data from the International Ultraviolet Explorer, and new...
The contribution to population in ellipticals of blue stragglers - A test of their origin
An observational test of the binary hypothesis for the origin of the blue straggler (BS) stars has been performed searching for radial velocity variables among...
The IAC and the ULL participate in the discovery of an unusual ‘stellar dance’ that could culminate in an explosion visible from Earth
A greedy white dwarf star in our own Milky Way galaxy is devouring its closest celestial companion at a rate never seen before, according to an international...
The IAC discovers a pair of stars condemned to explode as a supernova only 150 light years away
A study published today in Nature Astronomy , in which a researcher from the IAC has participated, outlines the discovery of an extremely rare type of binary...
The IAC validates a method for measuring the masses of stars using their seismic waves
An international team of astronomers, including researchers from the IAC, have performed a unique cosmic test - measuring the mass of an ancient star using two...
The James Webb Space Telescope captures 'the wedding rings' of a stellar couple
An international team, including a researcher from the Instituto de Astrofísica de Canarias (IAC), has obtained an incredible image of the planetary nebula NGC...
The Mass of the Neutron Star in CYG X-2 (V1341 CYG)
Cygnus X-2 is one of the brightest and longest known X-ray sources. We present high resolution optical spectroscopy of Cyg X-2 obtained over 4 years which gives...
The H-alpha emission star BD + 24 deg 676, formerly classified as a T Tauri star and more recently as a Herbig Ae star, has been observed at moderately high...